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Horizon: Space Junk
In 2014, the International Space Station had to move three times to avoid lethal chunks of space debris and there is an increasing problem of satellites mysteriously breaking down. With first-hand accounts from astronauts and experts, Horizon reveals the scale of the problem of space junk. Our planet is surrounded by hundreds of millions of pieces of junk moving at 17,000 miles per hour. Now the US government is investing a billion dollars to track them, and companies around the world are developing ways to clear up their mess - from robot arms to nets and harpoons.

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Welcome to BBC Earth Lab! Always wanted to know What the world’s strongest material is? Why trains can’t go uphill? Or How big our solar system really is? Well you’ve come to the right place. Here at BBC Earth Lab we answer all your curious questions about science in the world around you (and further afield too). As well as our Earth Lab originals we'll also bring you the best science and educational clips from the BBC science documentary archive including Forces of Nature with Brian Cox, James May's Things You Need To Know and plenty to keep the Docs away with Trust Me I’m A Doctor. And if there’s a question you have that we haven’t yet answered or an experiment you’d like us to try let us know in the comments on any of our videos and it could be answered by one of our Earth Lab experts. So whether you’re studying or just love to learn, BBC Earth Lab is your go to science channel – subcribe to never miss a video: http://bit.ly/SubscribeToEarthLab

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